Device for arranging the actuating shaft of a low-voltage circuit-breaker and multipole low-voltage circuit breaker with a device for arranging the actuating shaft

Abstract

In order to provide a bearing for an already prepositioned switching shaft, fitted with coupling levers, of a low-voltage circuit breaker in the region where the switching forces act, a bearing assembly is provided. The bearing assembly includes a bearing body which is mounted on the housing front wall of the switch pole, surrounding the switching shaft in the form of a half shell. The bearing body includes a subregion which projects between two coupling levers, which are at a distance from one another and are connected to a movable switching contact. It thus forms side guide surfaces for the coupling levers. Such a bearing assembly can be arranged in both the end regions of the switching shaft in multipole circuit breakers.

What is claimed is:  
     
       1. A bearing arrangement for a switching shaft of a low-voltage circuit breaker, in which two coupling levers are arranged at a distance from one another on an integral switching shaft, for mechanical connection of a movable switching contact associated with one switch pole, comprising: 
       a bearing assembly, connected to a housing front wall of the switch pole and including a bearing body mounted on the housing front wall of the switch pole, surrounding the switching shaft in the form of a half shell, and wherein a first subregion of the bearing body is arranged between the coupling levers and forms side guide surfaces for the coupling levers, which are connected to the switching shaft.  
     
     
       2. The arrangement as claimed in  claim 1 , 
       wherein the bearing body includes a second subregion, which projects axially beyond the coupling levers and forms stop surfaces for the coupling levers.  
     
     
       3. The arrangement as claimed in  claim 1 , wherein the bearing assembly includes a catch hook, whose mating piece forms a bolt which passes through the coupling levers, with the catch hook being mounted in a recess in the bearing body so as to be pivotable. 
     
     
       4. A multipole low-voltage circuit breaker including a bearing arrangement as claimed in  claim 1 . 
     
     
       5. The arrangement as claimed in  claim 2 , wherein the bearing assembly includes a catch hook, whose mating piece forms a bolt which passes through the coupling levers, with the catch hook being mounted in a recess in the bearing body so as to be pivotable. 
     
     
       6. A multipole low-voltage circuit breaker including a bearing arrangement as claimed in  claim 2 . 
     
     
       7. A multipole low-voltage circuit breaker including a bearing arrangement as claimed in  claim 3 . 
     
     
       8. A multipole low-voltage circuit breaker comprising: 
       a plurality of switching contacts;  
       a switching shaft, in which two coupling levers are arranged on the switching shaft for mechanical connection of each movable switching contact, associated with a switch pole; and  
       a bearing assembly connected to a housing front wall of the switch pole and including a bearing body mounted on the housing front wall of the switch pole, surrounding the switching shaft in the form of a half shell, wherein a first subregion of the bearing body is arranged between the coupling levers and forms side guide surfaces for the coupling levers, which are connected to the switching shaft.  
     
     
       9. The multipole low-voltage circuit breaker of  claim 8 , wherein the bearing body includes a second subregion, which projects axially beyond the coupling levers and forms stop surfaces for the coupling levers. 
     
     
       10. The multipole low-voltage circuit breaker of  claim 8 , wherein the bearing assembly includes a catch hook, whose mating piece forms a bolt which passes through the coupling levers, with the catch hook being mounted in a recess in the bearing body so as to be pivotable.